3 years ago

Vibrational Spectroscopy of a Low-Band-Gap Donor–Acceptor Copolymer and Blends

Vibrational Spectroscopy of a Low-Band-Gap Donor–Acceptor Copolymer and Blends
Simon Schmitt, Christof Walter, Carsten Deibel, Vladimir Dyakonov, Franziska Fuchs, Eva M. Herzig, Peter Müller-Buschbaum, Bernd Engels
The molecular vibrations of the polymer PCDTBT are examined with resonant Raman spectroscopy accompanied by DFT calculations. By comparison of the building blocks (DTBT and carbazole), the monomer unit, and the polymer, most of the strongest vibrations can be identified and assigned. This systematic study reveals that the polymer vibrations are dominated by the monomer modes. Blending with PC71BM at varying fullerene load exhibits no influence on the Raman signature of PCDTBT. This interesting finding is discussed in the context of yet changing morphology, which is investigated by atomic force microscopy and grazing-incidence wide-angle X-ray scattering measurements, and solar cell performance. Therefore, Raman spectroscopy may not be generally suitable to study the molecular order in very amorphous low-band-gap polymers, as shown here for PCDTBT.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b03429

DOI: 10.1021/acs.jpcc.7b03429

You might also like
Never Miss Important Research

Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.